学个词 Learn a Word-VOA英语教学 2760 bacteria

今天我们要学的词是 bacteria. Bacteria 名词，细菌。The World Health Organization issued a list of the top 12 types of bacteria that are most dangerous to humans. 世界卫生组织公布了对人体危害最严重的12个类别的细菌清单。New research shows that some friendly bacteria on our skin can produce natural antibiotics¹ and help ward² off bad bacteria. 最新研究显示，人体皮肤上对人体有利的细菌可以产生天然抗生物质，防范有害细菌的威胁。好的，我们今天学习的词是 bacteria, bacteria, bacteria...

1 antibiotics   

n.（用作复数）抗生素；（用作单数）抗生物质的研究；抗生素，抗菌素( antibiotic的名词复数 )

参考例句：

• the discovery of antibiotics in the 20th century 20世纪抗生素的发现
• The doctor gave me a prescription for antibiotics. 医生给我开了抗生素。

2 ward   

n.守卫，监护，病房，行政区，由监护人或法院保护的人（尤指儿童）；vt.守护，躲开

参考例句：

• The hospital has a medical ward and a surgical ward.这家医院有内科病房和外科病房。
• During the evening picnic,I'll carry a torch to ward off the bugs.傍晚野餐时，我要点根火把，抵挡蚊虫。